Alt-N MDaemon Webmail 19.5.5 File Attachment cross site scripting

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CVSS Meta Temp Score
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4.1$0-$5k0.00

A vulnerability classified as problematic was found in Alt-N MDaemon Webmail 19.5.5 (Mail Server Software). Affected by this vulnerability is an unknown part of the component File Attachment Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. As an impact it is known to affect integrity. An attacker might be able to inject arbitrary html and script code into the web site. This would alter the appearance and would make it possible to initiate further attacks against site visitors. The summary by CVE is:

Stored cross-site scripting (XSS) in file attachment field in MDaemon webmail 19.5.5 allows an attacker to execute code on the email recipient side while forwarding an email to perform potentially malicious activities.

The weakness was published 02/04/2021. The advisory is shared at kailashbohara.com.np. This vulnerability is known as CVE-2020-18723 since 08/13/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading eliminates this vulnerability. The upgrade is hosted for download at altn.com.

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VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Cross site scripting
CWE: CWE-79
ATT&CK: T1059.007

Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: altn.com

Timelineinfoedit

08/13/2020 CVE assigned
02/04/2021 +175 days Advisory disclosed
02/04/2021 +0 days VulDB entry created
02/23/2021 +19 days VulDB last update

Sourcesinfoedit

Vendor: https://www.altn.com/

Advisory: kailashbohara.com.np
Status: Confirmed

CVE: CVE-2020-18723 (🔒)

Entryinfoedit

Created: 02/04/2021 10:15 AM
Updated: 02/23/2021 12:24 PM
Changes: (5) source_cve_assigned source_cve_nvd_summary vulnerability_cvss2_vuldb_tempscore vulnerability_cvss3_vuldb_tempscore vulnerability_cvss3_meta_tempscore
Complete: 🔍

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